Flow and ingestion in a turbine disc cavity under rotationally-dominated conditions
An investigation of hot gas ingestion driven by the disc pumping effect in a chute seal was conducted at the Oxford Rotor Facility. Measurements of mean pressure, unsteady pressure and gas concentration have been logged and analysed under different operating conditions. The sensitivity of mean cavit...
| Main Authors: | , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
MDPI
2021
|
| _version_ | 1797107680745095168 |
|---|---|
| author | Bru Revert, A Beard, PF Chew, JW |
| author_facet | Bru Revert, A Beard, PF Chew, JW |
| author_sort | Bru Revert, A |
| collection | OXFORD |
| description | An investigation of hot gas ingestion driven by the disc pumping effect in a chute seal was conducted at the Oxford Rotor Facility. Measurements of mean pressure, unsteady pressure and gas concentration have been logged and analysed under different operating conditions. The sensitivity of mean cavity pressure coefficient, frequency spectra of the unsteady pressures and sealing effectiveness to changing conditions of purge flow, annulus flow, rotor disc speed and seal clearance have been studied. The steady pressures revealed the development of two vortices in the cavity, induced by the sharp change in geometry of the stator wall. The increased shear at the interface between these two vortices strengthened the unsteady activity at this location. The addition of mainstream flow improved the sealing capability of the chute seal under certain operating conditions. The excitation of further frequencies when an axisymmetric annulus flow was introduced suggests a complex interaction between annulus and purge flows. |
| first_indexed | 2024-03-07T07:17:47Z |
| format | Journal article |
| id | oxford-uuid:126ebacf-923f-498e-a815-7da354b4f24e |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:17:47Z |
| publishDate | 2021 |
| publisher | MDPI |
| record_format | dspace |
| spelling | oxford-uuid:126ebacf-923f-498e-a815-7da354b4f24e2022-09-13T10:36:31ZFlow and ingestion in a turbine disc cavity under rotationally-dominated conditions Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:126ebacf-923f-498e-a815-7da354b4f24eEnglishSymplectic ElementsMDPI2021Bru Revert, ABeard, PFChew, JWAn investigation of hot gas ingestion driven by the disc pumping effect in a chute seal was conducted at the Oxford Rotor Facility. Measurements of mean pressure, unsteady pressure and gas concentration have been logged and analysed under different operating conditions. The sensitivity of mean cavity pressure coefficient, frequency spectra of the unsteady pressures and sealing effectiveness to changing conditions of purge flow, annulus flow, rotor disc speed and seal clearance have been studied. The steady pressures revealed the development of two vortices in the cavity, induced by the sharp change in geometry of the stator wall. The increased shear at the interface between these two vortices strengthened the unsteady activity at this location. The addition of mainstream flow improved the sealing capability of the chute seal under certain operating conditions. The excitation of further frequencies when an axisymmetric annulus flow was introduced suggests a complex interaction between annulus and purge flows. |
| spellingShingle | Bru Revert, A Beard, PF Chew, JW Flow and ingestion in a turbine disc cavity under rotationally-dominated conditions |
| title | Flow and ingestion in a turbine disc cavity under rotationally-dominated conditions
|
| title_full | Flow and ingestion in a turbine disc cavity under rotationally-dominated conditions
|
| title_fullStr | Flow and ingestion in a turbine disc cavity under rotationally-dominated conditions
|
| title_full_unstemmed | Flow and ingestion in a turbine disc cavity under rotationally-dominated conditions
|
| title_short | Flow and ingestion in a turbine disc cavity under rotationally-dominated conditions
|
| title_sort | flow and ingestion in a turbine disc cavity under rotationally dominated conditions |
| work_keys_str_mv | AT brureverta flowandingestioninaturbinedisccavityunderrotationallydominatedconditions AT beardpf flowandingestioninaturbinedisccavityunderrotationallydominatedconditions AT chewjw flowandingestioninaturbinedisccavityunderrotationallydominatedconditions |